anti-slop-no-manual-effect-error-tag

Intent: a catch handler does not discriminate errors by _tag; catchTag and catchReason do.

// ❌ no
program.pipe(Effect.catch((error) => (error._tag === "NotFound" ? recover : Effect.fail(error))))

// ✅ yes
program.pipe(Effect.catchTag("NotFound", () => recover))

Trigger: an equality comparison between _tag (or reason._tag) and a string literal, or a switch on _tag, whose nearest enclosing function is a handler passed to Effect.catch, catchAll or catchIf. On reason._tag the message proposes Effect.catchReason(s).

Exemptions and blind spots: handlers of other combinators (catchTag, catchCause, mapError), and _tag checks in a function nested inside the handler. Outside these handlers the same checks belong to no-manual-discriminant-comparison: the two never fire on the same node.

Why: a hand-written dispatch keeps the caught errors in the type even when handled, and silently misses tags added later.

Options: none

Fix: none

Origin: absorbed from dmmulroy/anti-slop, MIT-licensed: see LICENSE.anti-slop.